1N4748A-TR

Overview

The Vishay 1N4748A-TR is a silicon planar power Zener diode in the DO-204AL (DO-41) axial through-hole package. It provides a nominal Zener voltage of 22 V with a standard tolerance of ±5%. The device operates at a test current of 11.5 mA and supports a maximum steady-state power dissipation of 1300 mW. Key electrical parameters include a dynamic impedance of 23 Ω, a reverse leakage current of 5 µA at 16.7 V, and a forward voltage of 1.2 V at 200 mA. It features a junction temperature rating of 175 °C and complies with AEC-Q101 automotive standards.

Feature Summary

• Designed for high-power voltage stabilization and clipping applications
• Utilizes silicon planar technology for robust performance
• Complies with AEC-Q101 qualification for automotive environments

Applications

• Voltage stabilization circuits
• Signal clipping applications

Procurement Notes

Verify that the ordering code matches the specific suffix required for the desired packaging format. Confirm compliance requirements against the latest Vishay documentation before finalizing procurement. Ensure lead lengths are maintained at 4 mm from the case during soldering to preserve thermal ratings. Validate component authenticity through authorized distribution channels.

Selection Notes

Select this component when a 22 V regulation point is required within a through-hole design. Consider the 1300 mW power dissipation limit and the 175 °C junction temperature capability for thermal management. Verify that the ±5% voltage tolerance meets the circuit's precision requirements. Evaluate the 23 Ω dynamic impedance for noise sensitivity in the target application.

Part Context

This part belongs to the Vishay 1N4728A to 1N4761A series of silicon planar power Zener diodes. The series covers a wide range of nominal voltages from 3.3 V to 75 V. All devices in this family share the same DO-41 package and fundamental material categorization, differing primarily in their specific Zener voltage ratings and associated test currents.

Replacement Considerations

Cross-reference other manufacturers' DO-41 packages rated for 22 V and 1.3 W. Verify that substitute components meet or exceed the 175 °C junction temperature and AEC-Q101 automotive qualification requirements.